Like the title says, imposing more depth to the NIN prior to fixing Mudra Lag is not good, IMHO.
Also, I must be honest... I'm very disappointed & sad that NIN will be receiving positionals on its rotations. Please reconsider.
I've mained MNK since 1.0~ until NIN's release... I enjoyed heavy positioning for a long time. I loved when you released NIN with the idea that the Job's complexity wouldn't lie in positioning but elsewhere (moreso on skillful execution/timing of CD's/Mudra's/Weaponskills).
To me, that was a very clever design & niche which the impression was made in my belief that it was a core design-paradigm & would remain. However, now you're telling us this isn't the case which frustrates me sadly.
If I wanted to play that style, I would play MNK (or to a lesser extent, lolDRG). NIN's unique design paradigm & approach is what drew me to the Job & I've mained it since.
Adding positionals will take away from the spirit of what makes NIN special & positively exciting for many.
Unfortunately, I (and it seems like a fair # of others; read: "RIP NIN") will retire NIN indefinitely if those changes go through (this is not a threat, just a bummer reality for me which I think will be helpful for based Yoshi to witness, as others too may share this depressing sentiment).
I think you could come up with something more clever & interesting than slapping on some positionals & homogenizing the Jobs further. Please keep that fresh aspect of NIN you set it apart with & founded it upon... I'm begging you.
Find a different way to introduce a new level of challenge to the Job if you must... just... not positionals, please I beg you.
Maybe something like a fourth Mudra instead with even more Upkeep or a system to need to actively be switching poison-stances to stay on top of DPS (like each will apply a diff. DE debuff or something + another difference as well so you want to cycle through intelligently, etc.).
Anything else besides the adding of positionals... retain the spirit of what makes NIN special & set apart.
Please, more creativity--not shoehorning in positionals for whatever reason you might have to do so.
And make Mudra Lag TOP PRIORITY, along with Chocobo during Queue, lightening of GC PVP Restrictions (a "fill queue" for solo to full-party; many players just want to ally with whomever they please & to have reduced queues, this would effectively solve both), & Sharing Household (with any friends we choose, NOT merely Eternal Bond Partner).
Thank you for the consideration, based Yoshida-san.
Sincerely,
A concerned & passionate NIN Main who wishes to stay one.